Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver
CVE-2025-20735

7.8HIGH

Key Information:

Vendor

MediaTek
Status
Mt6890, Mt7615, Mt7622, Mt7663, Mt7915, Mt7916, Mt7981, Mt7986
Vendor
CVE Published:
4 November 2025

What is CVE-2025-20735?

The vulnerability in the MediaTek WLAN AP driver is characterized by an out of bounds write resulting from an improper bounds check. This flaw allows for a local escalation of privilege, which doesn't require user interaction for exploitation. Remediation is available through patch WCNCR00435349, and users are strongly encouraged to apply it to mitigate potential risks.

Affected Version(s)

MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / openWRT 19.07, 21.02

References

https://corp.mediatek.com/product-security-bulletin/Novem...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-20735 : Out of Bounds Write Vulnerability in MediaTek WLAN AP Driver